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28 March 2024
 
  » arxiv » astro-ph/0412648

 Article overview


The Discovery of Primeval Large-Scale Structures with Forming Clusters at Redshift 6
M. Ouchi ; K. Shimasaku ; M. Akiyama ; K. Sekiguchi ; H. Furusawa ; S. Okamura ; N. Kashikawa ; M. Iye ; T. Kodama ; T. Saito ; T. Sasaki ; C. Simpson ; T. Takata ; T. Yamada ; H. Yamanoi ; M. Yoshida ; M. Yoshida ;
Date 29 Dec 2004
Journal Astrophys.J. 620 (2005) L1-L4 DOI: 10.1086/428499
Subject astro-ph
AffiliationHubble Fellow, STScI, U.Tokyo, Subaru, NAOJ, Durham, JWU, OAO
AbstractWe report the discovery of primeval large-scale structures (LSSs) including two proto-clusters in a forming phase at z=5.7. We carried out extensive deep narrow-band imaging in the 1 deg^2 sky of the Subaru/XMM-Newton Deep Field, and obtained a cosmic map of 515 Ly alpha emitters (LAEs) in a volume with a transverse dimension of 180 Mpc x 180 Mpc and a depth of ~40 Mpc in comoving units. This cosmic map shows filamentary LSSs, including clusters and surrounding 10-40 Mpc scale voids, similar to the present-day LSSs. Our spectroscopic follow-up observations identify overdense regions in which two dense clumps of LAEs with a sphere of 1-Mpc diameter in physical units are included. These clumps show about 130 times higher star-formation rate density, mainly due to a large overdensity, ~80, of LAEs. These clumps would be clusters in a formation phase involving a burst of galaxy formation.
Source arXiv, astro-ph/0412648
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